Dr. W. Zeller specializes in adult endocrinology and pediatric endocrinology. Areas of particular interest for Dr. Zeller include diabetes, growth problems, and down syndrome. He is an in-network provider for Blue Cross/Blue Shield, Coventry, and United Healthcare Plans, in addition to other insurance carriers. Dr. Zeller graduated from Loyola University Chicago, Stritch School of Medicine. His residency was performed at Ann & Robert H. Lurie Children's Hospital of Chicago. He has received the distinction of Chicago Super Doctors. Dr. Zeller speaks Spanish. He is affiliated with Northwestern Medicine Central DuPage Hospital, Ann & Robert H. Lurie Children's Hospital of Chicago, and Delnor Hospital. His practice is open to new patients.

Dr. Demetra Rupp is an adult endocrinology specialist in Geneva, IL and Wheaton, IL. Her average patient rating is 2.5 stars out of 5. Dr. Rupp's hospital/clinic affiliations include Northwestern Medicine Regional Medical Group and Delnor Hospital. She takes Aetna EPO, Blue Cross/Blue Shield, and Coventry, as well as other insurance carriers. She welcomes new patients. Dr. Rupp attended medical school at Loyola University Chicago, Stritch School of Medicine.

Dr. Paul Menet works as an endocrinologist. Before performing his residency at a hospital affiliated with the University of Illinois at Chicago, Dr. Menet attended the University of Illinois College of Medicine at Chicago for medical school. These areas are among his clinical interests: thyroid problems, pituitary disorders, and endometrial cancer. His average rating from his patients is 3.0 stars out of 5. He is an in-network provider for Blue Cross/Blue Shield, Coventry, and HFN, as well as other insurance carriers. In addition to English, Dr. Menet speaks Spanish. He is affiliated with Northwestern Medicine Central DuPage Hospital and Adventist Medical Center GlenOaks. His practice is open to new patients.

Dr. Elizabeth Lowden's specialties are adult endocrinology and bariatrics (obesity treatment). She practices in Geneva, IL and Winfield, IL. These areas are among her clinical interests: metabolic syndrome, weight management, and nutrition issues. Dr. Lowden's professional affiliations include Northwestern Medicine Central DuPage Hospital, Northwestern Medicine Regional Medical Group, and Delnor Hospital. She is an in-network provider for several insurance carriers, including Aetna EPO, Blue Cross/Blue Shield, and Coventry. She is not currently accepting new patients. She attended Loyola University Chicago, Stritch School of Medicine and then went on to complete her residency at a hospital affiliated with Loyola University.

Dr. William Bayer practices adult endocrinology. His patients gave him an average rating of 3.5 out of 5 stars. Dr. Bayer is especially interested in diabetes, thyroid problems, and pituitary disorders. He is affiliated with Northwestern Medicine Central DuPage Hospital and Northwestern Medicine Regional Medical Group. He accepts Aetna EPO, Blue Cross/Blue Shield, Coventry, and more. Dr. Bayer is accepting new patients. He attended Loyola University Chicago, Stritch School of Medicine and then went on to complete his residency at a hospital affiliated with Loyola University.

Dr. Wahid Kassar specializes in adult endocrinology and practices in Wheaton, IL, Winfield, IL, and Lisle, IL. He has a 5.0 out of 5 star average patient rating. His areas of expertise include diabetes, growth problems, and thyroid problems. Dr. Kassar's professional affiliations include Northwestern Medicine Central DuPage Hospital, Northwestern Medicine Regional Medical Group, and Northwestern University Feinberg School of Medicine. He takes several insurance carriers, including Aetna EPO, Blue Cross/Blue Shield, and Coventry. He welcomes new patients. Dr. Kassar attended medical school at the University of Damascus Faculty of Medicine. His training includes a residency program at St. Barnabas Hospital, Bronx. In addition to English, Dr. Kassar speaks Arabic.

Dr. Daesman Suri sees patients in Wheaton, IL. Her medical specialty is adult endocrinology. In her practice, she is particularly interested in diabetes, pituitary tumor, and pregnancy. Patient ratings for Dr. Suri average 3.0 stars out of 5. She takes Blue Cross/Blue Shield, HFN, and Coventry, in addition to other insurance carriers. She graduated from the University of Chicago, Pritzker School of Medicine and then she performed her residency at a hospital affiliated with the University of Chicago. Dr. Suri is affiliated with Northwestern Medicine Central DuPage Hospital. She has an open panel.

Dr. Aileen Westrick, who practices in Carol Stream, IL, is a medical specialist in adult endocrinology. Her areas of expertise include diabetes, thyroid problems, and pituitary disorders. Dr. Westrick is an in-network provider for several insurance carriers, including Aetna EPO, Blue Cross/Blue Shield, and Coventry. She studied medicine at Loyola University Chicago, Stritch School of Medicine. Dr. Westrick trained at a hospital affiliated with Loyola University for her residency. Her hospital/clinic affiliations include Northwestern Medicine Central DuPage Hospital, Northwestern Medicine Regional Medical Group, and Delnor Hospital. She is open to new patients.

Dr. Carrie Zimmer specializes in pediatric endocrinology and practices in Wheaton, IL. Before completing her residency at a hospital affiliated with the University of Chicago, Dr. Zimmer attended medical school at the University of Michigan Medical School. Her clinical interests encompass diabetes, growth problems, and thyroid problems. Dr. Zimmer is an in-network provider for Aetna EPO, Blue Cross/Blue Shield, HFN, and more. Dr. Zimmer is professionally affiliated with Northwestern Medicine Central DuPage Hospital and Ann & Robert H. Lurie Children's Hospital of Chicago. She is open to new patients.

Dr. Stephen Skjei is an adult endocrinology specialist in Wheaton, IL. In his practice, he is particularly interested in diabetes. Patient ratings for Dr. Skjei average 5.0 stars out of 5. He honors Blue Cross/Blue Shield, Coventry, United Healthcare Plans, and more. Before completing his residency at a hospital affiliated with the University of Chicago, Dr. Skjei attended medical school at Washington University in St. Louis School of Medicine. He is affiliated with Northwestern Medicine Central DuPage Hospital. New patients are welcome to contact his office for an appointment.

Dr. Matheni Sathananthan works as an adult endocrinologist in Wheaton, IL. Dr. Sathananthan attended medical school at SUNY, University at Buffalo School of Medicine & Biomedical Sciences. Her areas of expertise include diabetes, pituitary disorders, and osteoporosis. She honors Aetna EPO, Blue Cross/Blue Shield, and Coventry, in addition to other insurance carriers. Her hospital/clinic affiliations include Northwestern Medicine Central DuPage Hospital and Northwestern Medicine Regional Medical Group. Her practice is open to new patients.

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What is Endocrinology?

Endocrinology is a medical specialty that deals with glands and hormones. Hormones are substances that act like chemical messengers between parts of the body. They are produced by glands, and travel in the bloodstream throughout the body where they act on different organs and cells to affect many different functions of life. Hormones control our appetite, growth, reproduction, and energy. When there is too little or too much of a hormone, an endocrinologist can help restore the balance.

Endocrinology problems are sometimes difficult and complex because hormones travel throughout the body and can affect more than one system. A single, simple imbalance can produce multiple, very different symptoms. Just a few of the diverse diseases treated by an endocrinologist include:

Diabetes (where insulin is not produced in the body or is not working well, and blood sugar levels rise, which damages tissues)

Hypothyroidism (where thyroid hormones are not produced well, reducing cell metabolism and energy)

Precocious Puberty (where reproductive hormones are produced too early in a child’s life)

Gigantism (where growth hormones are overproduced, leading to unusual size)

Endocrinology can contain subspecialties where physicians focus their care on specific groups of patients. For example, some endocrinologists are diabetic endocrinologists who know specifically how to care for diabetics’ particular needs in eye care, circulation, and foot care. Pediatric endocrinologists treat children. Whatever their subspecialty, all endocrinologists have the same goal: restoring balance when the body’s messaging system is not working correctly.